drivers/net/wireless/intel/iwlwifi/fw/smem.c

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /*
   3  * Copyright (C) 2012-2014, 2018-2020 Intel Corporation
   4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
   5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
   6  */
   7 #include "iwl-drv.h"
   8 #include "runtime.h"
   9 #include "fw/api/commands.h"
  10
  11 static void iwl_parse_shared_mem_22000(struct iwl_fw_runtime *fwrt,
  12                                        struct iwl_rx_packet *pkt)
  13 {
  14         struct iwl_shared_mem_cfg *mem_cfg = (void *)pkt->data;
  15         int i, lmac;
  16         int lmac_num = le32_to_cpu(mem_cfg->lmac_num);
  17         u8 api_ver = iwl_fw_lookup_notif_ver(fwrt->fw, SYSTEM_GROUP,
  18                                              SHARED_MEM_CFG_CMD, 0);
  19
  20         if (WARN_ON(lmac_num > ARRAY_SIZE(mem_cfg->lmac_smem)))
  21                 return;
  22
  23         fwrt->smem_cfg.num_lmacs = lmac_num;
  24         fwrt->smem_cfg.num_txfifo_entries =
  25                 ARRAY_SIZE(mem_cfg->lmac_smem[0].txfifo_size);
  26         fwrt->smem_cfg.rxfifo2_size = le32_to_cpu(mem_cfg->rxfifo2_size);
  27
  28         if (api_ver >= 4 &&
  29             !WARN_ON_ONCE(iwl_rx_packet_payload_len(pkt) < sizeof(*mem_cfg))) {
  30                 fwrt->smem_cfg.rxfifo2_control_size =
  31                         le32_to_cpu(mem_cfg->rxfifo2_control_size);
  32         }
  33
  34         for (lmac = 0; lmac < lmac_num; lmac++) {
  35                 struct iwl_shared_mem_lmac_cfg *lmac_cfg =
  36                         &mem_cfg->lmac_smem[lmac];
  37
  38                 for (i = 0; i < ARRAY_SIZE(lmac_cfg->txfifo_size); i++)
  39                         fwrt->smem_cfg.lmac[lmac].txfifo_size[i] =
  40                                 le32_to_cpu(lmac_cfg->txfifo_size[i]);
  41                 fwrt->smem_cfg.lmac[lmac].rxfifo1_size =
  42                         le32_to_cpu(lmac_cfg->rxfifo1_size);
  43         }
  44 }
  45
  46 static void iwl_parse_shared_mem(struct iwl_fw_runtime *fwrt,
  47                                  struct iwl_rx_packet *pkt)
  48 {
  49         struct iwl_shared_mem_cfg_v2 *mem_cfg = (void *)pkt->data;
  50         int i;
  51
  52         fwrt->smem_cfg.num_lmacs = 1;
  53
  54         fwrt->smem_cfg.num_txfifo_entries = ARRAY_SIZE(mem_cfg->txfifo_size);
  55         for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++)
  56                 fwrt->smem_cfg.lmac[0].txfifo_size[i] =
  57                         le32_to_cpu(mem_cfg->txfifo_size[i]);
  58
  59         fwrt->smem_cfg.lmac[0].rxfifo1_size =
  60                 le32_to_cpu(mem_cfg->rxfifo_size[0]);
  61         fwrt->smem_cfg.rxfifo2_size = le32_to_cpu(mem_cfg->rxfifo_size[1]);
  62
  63         /* new API has more data, from rxfifo_addr field and on */
  64         if (fw_has_capa(&fwrt->fw->ucode_capa,
  65                         IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG)) {
  66                 BUILD_BUG_ON(sizeof(fwrt->smem_cfg.internal_txfifo_size) !=
  67                              sizeof(mem_cfg->internal_txfifo_size));
  68
  69                 fwrt->smem_cfg.internal_txfifo_addr =
  70                         le32_to_cpu(mem_cfg->internal_txfifo_addr);
  71
  72                 for (i = 0;
  73                      i < ARRAY_SIZE(fwrt->smem_cfg.internal_txfifo_size);
  74                      i++)
  75                         fwrt->smem_cfg.internal_txfifo_size[i] =
  76                                 le32_to_cpu(mem_cfg->internal_txfifo_size[i]);
  77         }
  78 }
  79
  80 void iwl_get_shared_mem_conf(struct iwl_fw_runtime *fwrt)
  81 {
  82         struct iwl_host_cmd cmd = {
  83                 .flags = CMD_WANT_SKB,
  84                 .data = { NULL, },
  85                 .len = { 0, },
  86         };
  87         struct iwl_rx_packet *pkt;
  88         int ret;
  89
  90         if (fw_has_capa(&fwrt->fw->ucode_capa,
  91                         IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG))
  92                 cmd.id = iwl_cmd_id(SHARED_MEM_CFG_CMD, SYSTEM_GROUP, 0);
  93         else
  94                 cmd.id = SHARED_MEM_CFG;
  95
  96         ret = iwl_trans_send_cmd(fwrt->trans, &cmd);
  97
  98         if (ret) {
  99                 WARN(ret != -ERFKILL,
 100                      "Could not send the SMEM command: %d\n", ret);
 101                 return;
 102         }
 103
 104         pkt = cmd.resp_pkt;
 105         if (fwrt->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_22000)
 106                 iwl_parse_shared_mem_22000(fwrt, pkt);
 107         else
 108                 iwl_parse_shared_mem(fwrt, pkt);
 109
 110         IWL_DEBUG_INFO(fwrt, "SHARED MEM CFG: got memory offsets/sizes\n");
 111
 112         iwl_free_resp(&cmd);
 113 }
 114 IWL_EXPORT_SYMBOL(iwl_get_shared_mem_conf);